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The picture that you have currently provided is enough to determine whether it is normal xenon or bi-xenon. And I what I could say here is that, bi-xenon and xenon doesn't make much of a difference as they both uses the same type of bulbs, what I could say is that, the difference between xenon and bi-xenon is that xenon uses 4 xenon bulbs, and bi-xenon uses only 2 bulbs and from what it seems, the one you have is bi-xenon.

The picture that you have currently provided is enough to determine whether it is normal xenon or bi-xenon. And I what I could say here is that, bi-xenon and xenon doesn't make much of a difference as they both uses the same type of bulbs, what I could say is that, the difference between xenon and bi-xenon is that xenon uses 4 xenon bulbs, and bi-xenon uses only 2 bulbs and from what it seems, the one you have is bi-xenon.

You're a little off... Bixenon and xenon both only use 2 xenon bulbs. Xenon uses halogen for highbeams, while the bixenons move a shutter in the projector so that the HIDs can be used for highbeams. In European cars, both the shutters and the halogens are used together for the highbeams.

OP:
All 02+ BMWs have bixenons in lieu of normal xenons. If your car truly is an 03, it has bixenons.

The one in your picture is a bixenon headlight, but it look like it's a US spec headlight. I've told you in multiple threads, but US headlights will *not* meet European standards. Our regulations call for different qualities from the projectors, and our headlights don't have a socket for your parking lights.